Anglo-Catholic translations (e.g., those by John Mason Neale) can often be found in "accepted" Catholic PD alt versions in the Baltimore Parochial Hymn Book (words only, 1886), or else in Tozer's Catholic Church Hymnal (1905) or Young's Catholic Hymnal (1911?). St. Mark's and the Arundel Hymnals are also good PD sources, with the latter a veritable treasure trove. If you can find an "accepted" Catholic PD version of a hymn translated by a non-Catholic, please note where you found it.